Isichongi sombhobho we-GD-7018 optical fiber ungafumana ngokuchanekileyo kwaye ulinganise ubunzulu bemibhobho engaphantsi komhlaba, iintambo kunye neentambo zamehlo phantsi kwemeko ngaphandle kokugrunjwa, kwaye zifumane ngokuchanekileyo iindawo zomonakalo we-coat yangaphandle yemibhobho engaphantsi komhlaba kunye nendawo ekuyo. iindawo ezineempazamo zentambo zangaphantsi komhlaba.